Calibre DRC

Hello everybody,

When doing DRC through Calibre, layout cells have not been flattened
before running DRC check.
This leads to the lots of errors of acute angles of certain metal
layers. Hence, I have to flatten layout manually before DRC run (very
inconvenience work).

However when doing DRC through Assura that I used to do, everything
went through nicely
and no acute angle problem reported.

Does anyone know how to solve this problem (I guess it would just
require to modify calibre config file)?
Thank you very much.

Regs,

Mobil

 

Dear Mobil,

I have been working with Calibre for 7 years and I have never seen
such a thing. You definitely don't need such a fiddling to get your
calibre run as Assura does. Calibre could be run in either Flat/Hier.
Does your errors appear in both modes ?

Cheers,
Riad.

 

Thanks Riad,
maybe I should say the problem more clearly.

Yes, I try both Flat/Hier mode, it doesn't whether the mode to be
chosen, the key is the DRC need to merge the same level metal if they
are connected. e.g. if a shape of 45 deg M1 metal connected with a
square M1 metal to be a shape of 135 deg metal. The Assura DRC I used
before is to merge them together and give no errors. But the Calibre
DRC still treats them as two separate metal and give an error of 'not
allow for 45 deg shape'.

Did you have this problem before?
Thank you.

Regards,

Mobil

 

Hi Mobil,

Thanks for this detailed explanation, I understand your problem now.
I think there is something lacking in your DRC Deck, you could maybe
check whether you're using the ANGLE command to allow 45 degrees
angles and not consider them as acute angles. There is an example.

MET1_NOT_45_90 {
// Check MET1 edges are either 45 or 90 degs.
ANGLE MET1 > 0 < 45
ANGLE MET1 > 45 < 90
}

Hope this helps !

Riad.

 

hi, Mobil,

I have the similar problem with you. DRC didn't merge and it said the
area of M1 is too small.

Have you solved your errors?

thank you!

Kuande

 

Not yet, so I have to draw a large area of the layer.